Monk tempest rush teleporting back ?

After using tempest rush, I'm supposed to be in front but instead I'm like using wizard skillteleport back to the same spot like some kind of lag. but the enemies aren't going back to the same spot as if they are using vortex.

So I'm keep using tempest rush and my spirit is going down but somehow I'm back at the same spot and I keep using the skill and then 2nd time to go back and 3rd time.

It was after tanking and using all the serenity,healing skills,potions. I got killed by arcane ray.